my ex wife file motion case after divorse is done on me i been make in late payments carpayments but i didnt do that on purpuse now she is asking judg

Your question is a little unclear, but ordering one party to "fix" someone else's credit is not what family court judges typically do.  What they might do is reduce arrears to judgment -- possibly with interest -- or impose other penalties for non-compliance with the Decree and its payment terms.  It is possible for you to seek modification of those terms, if it really is impossible for you to comply with them, but that is a tough sell in most cases.